Combustion-promoting device



March 24,1925. w 1,530,772

T. J. HEFFERNAN COMBUSTION PROMOTING DEVICE Filed April 12, 1924 37 F'yJ 2.9 2 771 am asJ/ efferiz an fiu wwww GHW awe/whom Patented Mar. 24, 1925.

UNITED TATES PATENT OFFICE.

THOMAS J. HEFFERNAN, F PROVIDENCE, 'RHODE ISLAND.

COMBUSTION -PROMOTI'1\T G DEVICE.

Application filed April 12, 1924. Serial No. 706,055.

- of promoting combustion therein; and has for its objectto mount a'chamber'in the fire pot of a furnace in which air and gases from the coal are mixed and heated and subsequently discharged into a mass of burning coal.

A further object of this invention "is to mount the chamber intermediate the plane of the grate and that of the feed door to contact directly with the burningcoal.

The invention further consists of means whereby the chamber may bebolted or secured to the inner side wall of the furnace,

in which position it is protected on one side against the heating action of the fiery mass .and so prevented from becoming melted.

With these and other objects in'view, the

invention consists of certain novel features of. construction, as will be more fully described,.and particularly vpointed out in the appended. claims.

In the accompanying drawings;

Figure 1 is a sectional side elevation showing my improved construction of mixing member.

Figure 4 is a central sectional side elevation of the cap member and showing the thickened wall which is exposed to the burning coal.

It is found in the practical operation of air and gas mixing chambers of this character, that if the same is mounted in the center of the burning mass of coal, the heat generated by passing the entering air and gases through the chamber into the burning mass, is so intense as to melt down the walls of the chamber. Therefore, in order to reduce the exposedwall area of the chamber to the direct action of the heat, I have mounted the chamber. to one side and supported it against the side wall of fire pot, which prevents the heat from complete lyencircling'the chamber and soprevents the same from becoming consumed or melted bythe excessive heat generated thereby.

I also. preferably mount this chamber slightly above the grate surface so as to permit the gas generated at the grate surface to enter and mix with the air in the chamber, which latter is drawn upwardly from below the grate and after they become mixed andheated are discharged into the burning coal at a point intermediate its 7 upper and lower surfaces they are. ignited to promote combustion and greatly intensify the heat inthe furnace; and the following is a detailed" description of one construction of such a mixing chamber vwhereby these advantageous results may be produced lVithreference to the drawings, 10 designates the body portion, of a gas-mixing chamber which is shown as being in tubular form open at its upper end 11 and provided with a perforated bottom portion 12 through which the air and gases may enter into'the body of the chamber. The wall about the lower portion 13 of this chamber is very heavy while that about the upper portion 14 is much thinner, and the upper peripheral'edge' of the tubular body is provided with a multiplicity of notches15 whereby the heated gases and air may escape therefrom. V

On one side of this body portion,'I have formed a flattened base 16 through which openings 17 and 18 areformed which are adapted to receive the heads 19 of the bolts 20 on which this chamber may be supported against the .side' walls 21 of the furnace 22 with its bottom portion 23 positioned a short distance above the upper surface 24 of the grate 25. A cap 26 is designed to set over the upper end of this body portion and is provided with a skirt 27 extending down for a short distance around the thinner wall portion 14 of the body and is arranged to be placed a short' distance outwardly from this portion of the body providing a passageway 28 through which the heated combined air and gases pass after flowing out through the notches 15 to be discharged about; the lower: edge of the skirt into the: mass 0t hurning' coal. 7

The inner lip 29 of this cap is. considerably thinner than the outer skirt portionso as to fit the space 30 at the upper edge of the body and so: determine the width of the passageway 28 for conducting the gases from the chamber into the fiery mass.

This lip 29% is notched as at 31 to fit over the upper end of the thickened portion: and so cause the cap to set in the correct. position, the upper face of this cap is: provided Witl n. 32 having an eye- 33- termed then an to: taci itate remota-l of the cap for cleaning the interior of the mi ing chamber when desired. My device is very simple and practical also inexpensive in its constructionand is: very effectivein its action, as by its 7 usein drawingair and alsoa portion or".

the generated coal gas into the chamber heating it and subsequently discharging the" heated mixture into the body of burning coal at a. point between its upper and lower surfaces: the combustion is materially pro meted;

'lhe toregoing description is: directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting: to all the mechanical changes to Wh-ich the device is susceptible, the invention being d efined and limited. only by the terms of the appended claims I claim: 7

I A mixing chamber for a furnace comprising a body portioir open at its top and having inlet ports at its base and outlet ports through the side Walls adjacent the top, a cap having a skirt spaced "from the side Walls of the body portion and means for" securing the body portion to the side Walls of a fire pot. I

2". A mixing chamber for a: furnace com prising a body portion open at its top and having inlet ports at its bottom and outlet ports through the Walls adjacent the top, a: caphating downward-1 y extending skirt spaced iron-r thesidewalls oi the body porpot.

tion, elongated openings the Wall of the body portion, bolts passing through the side of the fire pot and the openings in the. Wall of the body portion for vertically adjusting the mixing chamber Within the fire 3. A mixing chamber for a furnace comprising a body-"portion open at its top and having inlet ports at its base and outlet ports through thewalls adjacent the top the Walls of the body portion being inset at their upper portion, a cap having a: downwardly extending skirt overlapping and: spa-cedfrom the inset portion forming a. pass-geway between. the: skirt and: the inset portionof the Wall which com-mo? cateswith the outlet ports; through the wall, and: means for vertically adjusting the chamber. Within the fire pot ot a furnace. l 4. A. mixing; chamber for a turnace com.- l sing a: body? portion open at itse topy. haw in Yn letportsz at its base and outlet ports adjacent the top, cap: having a depending shirt spaced from! the body portion. and.

ing inlet ports. at its base and. outlet ports through for the reception therein oi bolts 1 extending through the Wall of the fire: pot for vertically ad ust1ng the chamber W d1 reiation to" theafire pot,. the cap belng recesseclv for the reception therein out the boss;

In testimony whereof I ailix my signa? ture..

. THOMAS J. HEFFERNAN. 

